Conservatives cherished it for being small and inconvenient, and thus keeping out the "new people" whom New York was beginning to dread and yet be drawn to; and the sentimental clung to it for its historic associations, and the musical for its excellent acoustics, always so problematic a quality in halls built for the hearing of music.
There are no more uses of "acoustic" in the book.
Show samples from other sources
She plays an acoustic guitar.
Then this guy—he couldn’t have been any older than Kyle—walked out onto the stage wearing a fedora and holding an acoustic guitar.